SEOUL, Oct. 23 (Yonhap) -- North Korean leader Kim Jong-un has dismissed or purged 31 senior officials including the former chief of the military's general staff since being anointed heir to his father and longtime leader Kim Jong-il in 2010, a South Korean lawmaker claimed Tuesday.

The younger Kim, who took power after his father's death last December, dismissed four members of the Central Military Commission of the North's ruling Workers' Party in September 2010, and purged 27 other ranking officials between 2011 and 2012, according to Rep. Yoon Sang-hyun of the South's ruling Saenuri Party.